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en.wikipedia.org/wiki/Gravity

Gravity, or gravitation, is a natural phenomenon by which all things with mass are brought toward (or gravitate toward) one another, including objects ranging ...

spaceplace.nasa.gov/what-is-gravity

Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun.

starchild.gsfc.nasa.gov/docs/StarChild/questions/question30.html

Gravity is a force of attraction that exists between any two masses, any two bodies, any two particles. Gravity is not just the attraction between objects and the ...

www.qrg.northwestern.edu/projects/vss/docs/space-environment/1-what-is-gravity.html

Gravity is a force pulling together all matter (which is anything you can physically ... The more matter, the more gravity, so things that have a lot of matter such as ...

briankoberlein.com/2015/02/26/cradle-to-grave

Feb 26, 2015 ... We often speak of gravity as a force. More accurately it is a feature of spacetime. Even more accurately, we don't know what it is.

science.howstuffworks.com/environmental/earth/geophysics/what-is-gravity.htm

The Road Runner cartoons play fast and loose with gravity. Given the opportunity , Wile E. Coyote usually chases his quick-footed foe off the edge of a cliff -- but ...

coolcosmos.ipac.caltech.edu/ask/300-What-is-gravity-

Gravity is a force which tries to pull two objects toward each other. Anything which has mass also has a gravitational pull. The more massive an object is, the  ...

www.pbs.org/wgbh/nova/physics/universe-gravity.html

May 8, 2014 ... A "cosmic fingerprint" reveals the universe's beginning and gravity's microscopic secrets.

www.einsteins-theory-of-relativity-4engineers.com/what-is-gravity.html

All of us know the effects of the mysterious force called gravity. However, the question 'what is gravity' is not easy to answer at all. The reason is that we don't ...